If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

Conspiracy

And much, much more.

Child pornography

How or where can I get any kind of books online for free?

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

Terroristic threats

HIPAA violations

Even Captain James T. Kirk was trapped in a woman's body. Don't you think he'd support trans people?

Trade secrets

Insurrection

Revealing classified information

There Is A Very Particular Reason Why Baboons Travel In Straight Lines - IFLScience

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Freedom of speech does not apply to:

Threats of violence

The Biggest Pokémon Card Crashers And Climbers This Week - June 2 - IGN

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

False advertising

Fraud

What can be done to combat group stalking and harassment by an organized gang or society, particularly when they use universal sound weapons?

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

Revenge porn

Perjury

In what ways is modern day Russia similar to the USSR? How does it differ from the USSR in terms of culture and politics?

Insider trading

No freedom is absolute.